Shared via Rust Playground

playground.rs

fn main() {
    swizzle_gen();
}

fn swizzle_gen() {
    swizzle_gen0("x");
    swizzle_gen0("y");
    swizzle_gen0("z");
    swizzle_gen0("w");
}

fn swizzle_gen0(c0: &str) {
    println!("{}", c0);
    swizzle_gen1(c0, "x");
    swizzle_gen1(c0, "y");
    swizzle_gen1(c0, "z");
    swizzle_gen1(c0, "w");
}

fn swizzle_gen1(c0: &str, c1: &str) {
    println!("{}{}", c0, c1);
    swizzle_gen2(c0, c1, "x");
    swizzle_gen2(c0, c1, "y");
    swizzle_gen2(c0, c1, "z");
    swizzle_gen2(c0, c1, "w");
}

fn swizzle_gen2(c0: &str, c1: &str, c2: &str) {
    println!("{}{}{}", c0, c1, c2);
    swizzle_gen3(c0, c1, c2, "x");
    swizzle_gen3(c0, c1, c2, "y");
    swizzle_gen3(c0, c1, c2, "z");
    swizzle_gen3(c0, c1, c2, "w");
}

fn swizzle_gen3(c0: &str, c1: &str, c2: &str, c3: &str) {
    println!("{}{}{}{}", c0, c1, c2, c3);
}